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- W2034886574 abstract "The effect of the support nature on the catalytic activity of platinum and ruthenium nanoparticles is investigated for ethylene complete oxidation in the temperature range of 25–220 °C. The nanoparticles (NPs) were deposited on ionically conductive supports: yttria-stabilized zirconia (YSZ) and samarium-doped ceria (SDC), and on non-ionically conductive supports: carbon black (C) and gamma-alumina (γ-Al2O3) to give ≤0.7 wt% loading and an average particle sizes of 1.9–2.9 nm depending on the support. The presence of O2− ionic conductivity greatly enhanced Pt and Ru catalytic activity compared with the same metals deposited on non-ionically conductive supports for C2H4 complete oxidation. The light off temperatures of Pt/SDC and Ru/SDC were 60 °C and 70 °C, respectively, whereas for the same NPs deposited on the high surface area carbon, the higher temperatures of 90 °C for Pt/C and 130 °C for Ru/C were obtained. The same trend was observed with activation energies, which were 22 and 35.1 kJ/mol for Pt/SDC and Ru/SDC compared with 31 and 52.4 kJ/mol for Pt/C and Ru/C, respectively. It is proposed that metal–support interaction (MSI), in particular, the electronic effect between NPs and ionic conductors is responsible for the high catalytic activity. The electronic effect is manifested by the oxygen ion exchange in the vicinity of the three-phase boundary similar to the electrochemical promotion mechanism, which is thermally self-induced in the case of Pt and Ru NPs deposited on SDC and YSZ." @default.
- W2034886574 created "2016-06-24" @default.
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- W2034886574 date "2015-03-01" @default.
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- W2034886574 title "Effect of ionically conductive supports on the catalytic activity of platinum and ruthenium nanoparticles for ethylene complete oxidation" @default.
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- W2034886574 doi "https://doi.org/10.1016/j.cattod.2014.03.061" @default.
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